package server

import (
	"github.com/gin-gonic/gin"
	"github.com/prometheus/client_golang/prometheus/promhttp"
	"github.com/vearutop/statigz"
	"go.uber.org/zap"
	"io"
	"io/fs"
	"net/http"
)

func GUI(s *Server) {
	r := s.Engine
	webFS, err := fs.Sub(webRootFS, "web")
	if err != nil {
		zap.S().Panic("init gui err, cause: ", err)
	}

	guiStaticResource(r, webFS)
	guiIndexHTML(r, webFS)
}

func guiStaticResource(r *gin.Engine, sfs fs.FS) {

	const (
		staticPrefix = "/assets"
		stripPrefix  = ""
	)

	staticResource := http.StripPrefix(stripPrefix, statigz.FileServer(sfs.(fs.ReadDirFS)))
	r.GET(staticPrefix+"/*w", func(c *gin.Context) {
		staticResource.ServeHTTP(c.Writer, c.Request)
	})
	r.GET("/favicon.ico", func(c *gin.Context) {
		staticResource.ServeHTTP(c.Writer, c.Request)
	})
}

func guiIndexHTML(r *gin.Engine, sfs fs.FS) {
	var indexHTML []byte
	{
		const indexFileName = "index.html"
		index, err := sfs.Open(indexFileName)
		if err != nil {
			zap.S().Panicf("open [%s] err! cause: %e", indexFileName, err)
		}
		indexHTML, err = io.ReadAll(index)
		if err != nil {
			zap.S().Panicf("read [%s] err! cause: %e", indexFileName, err)
		}
	}

	r.GET("/", html(indexHTML))
}

func API(s *Server) {
	r := s.Engine
	r.GET("/metrics", gin.WrapH(promhttp.Handler()))

	apiGroup := r.Group("/api")
	{
		v1 := apiGroup.Group("/v1")
		_ = v1
	}
}